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[media] V4L: Add v4l2_event_subdev_unsubscribe() helper function

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Add a v4l2 core helper function that can be used as the subdev
.unsubscribe_event handler. This allows to eliminate some
boilerplate from drivers that are only handling the control events.

Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2013-01-22 18:58:57 -03:00 committed by Mauro Carvalho Chehab
parent 2ccbe779bc
commit 4f4d14b70a
2 changed files with 10 additions and 1 deletions
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7
drivers/media/v4l2-core/v4l2-event.c
View File

@ -311,3 +311,10 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh,
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe);
int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
{
return v4l2_event_unsubscribe(fh, sub);
}
EXPORT_SYMBOL_GPL(v4l2_event_subdev_unsubscribe);

4
include/media/v4l2-event.h
View File

@ -64,6 +64,7 @@
*/
struct v4l2_fh;
struct v4l2_subdev;
struct v4l2_subscribed_event;
struct video_device;
@ -129,5 +130,6 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub);
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
#endif /* V4L2_EVENT_H */